Realcanuk

I am looking for a 90 mm idler pulley for my LS2, 6 rib setup. Someone told me there is a ford factory part that fits, but I have no idea from what application.
Doesn't matter if ford, aftermarket , whatever. Does anyone know where I can get one?

Thanks

stevieturbo

This place makes a few.

http://www.thumpracing.com/idler_pulleys.htm